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anyanavicka [17]
3 years ago
7

What is the vertex of f(×)=5×^2+20×-16

Mathematics
1 answer:
cupoosta [38]3 years ago
3 0

Answer: The vertex is ( -2, -36)

Step-by-step explanation:

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Which expression has a value of 15 when n = 7? <br><br> 43 - 5n<br> 3n - 5<br> 6n - 28<br> 19 - 28/n
cupoosta [38]
19 - 28/n
n=7
19 - 28/7
19 - 4
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Which of the following points are solutions to the inequality below?
Yakvenalex [24]
So, in order to find out which ordered pairs are the solutions to the given inequality above, we just have to plug in the given values.
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2 > -3(0) + 2
2 > 0 + 2
2 > 2 ---- 2 is not greater than 2, which makes this ordered pair not a solution to the given inequality.
So, do the same with the rest of the ordered pairs.
So the ordered pairs that are the solutions would only be options C, E and F. Hope that answer helps. 
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3 years ago
What is the solution to -(2x + 4) + x = 3x − 4x − 4?
KATRIN_1 [288]

Answer:

x=-2

Step-by-step explanation:

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Help me pleaseeeeeee! Ratios and Rates! Worth 20 points help I need the answers in 45 minutes!
Ostrovityanka [42]

Answer:

3) 7:8  7 to 8   4) 40/100 = 2/5   5) 60 mph   6) 300 kph   7) Jane  8) Jon can go faster

Step-by-step explanation:

5) 120/2 =60

6) 900/3 =300

7) Tim =50/5= $10 an hour

Jane= 24/2 =$12 an hour

6 0
3 years ago
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If Dominik completes a project by himself, it will take him 8 hours. Working with Katarina, it will take them 5 hours. If they w
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The main formula we use here is Work=Rate*Time,


1. The rate (speed of working) of Dominik is 

r_D=1project/8hours= \frac{1}{8}(prj/h)

2. Let the the rate of Katarina be r_K=x(prj/h)

Together they have a rate of r_D_K equal to \frac{1}{8}+x (project per hour)

so (\frac{1}{8}+x) ( \frac{proj}{hr})*5(hr)=1(proj)

simplify the units:

(\frac{1}{8}+x) *5=1

\frac{1}{8}+x = \frac{1}{5}

x= \frac{1}{5}- \frac{1}{8}= \frac{8-5}{40}= \frac{3}{40}

so the rate of Katarina is 3/40 (proj per hour)

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In 5 hours Dominik complets 5*5/40=25/40 of the project

Katarina completes 5*3/40=15/40 of the project.
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3 years ago
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